LuLu is the free open-source macOS firewall
Simple tool to configure Windows Filtering Platform (WFP)
A simple way to block access to the internet per app
Anti Spam SMTP Gateway
Next Generation Open Source Firewall
Add rule to windows firewall to block inbound and outbound traffic
Bypass your ISP's firewalls and connect to the internet!
Provisions Simple Secure Network Firewall/Router
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
Open source voucher management / hotspot system
Linux firewall distribution geared towards home and SOHO users.
Programmable completion code (bash) for ipset (netfilter.org)
Jateway is a general purpose TCP/IP connection proxy
network control and reporting
KnockIt! is a port Knocking tool for MAC OSX
Easy to use firewall for linux beginners.
iptables web interface